Pumping apparatus



-Jul -a1, 1921 1,463,305

S. D. BLACK ET AL PUMPINQ APPARATUS Filed July 23 1919 4 Sheets-Sheet 1 July 31, 1923. 1,463,305

, S. D. BLACK ET AL PUMPING APPARATUS Filed July 23 I919 4 Sheets-Sheet 5 July 31, 1923,

S. D. BLACK ET AL PUMPING APPARATUS I Filed July 23 1919 4 Sheets-Sheet 4 II IIIIIIII/I/I/IIIIIIIIIll/IIII/I/ lllfll/ I were my 31,1923;

time smeasamunn DUNCAN annex" AnoNzo' GALLOWAY DECKER, or Bammoan, v MARYLAND, assrenons, BY mnsm: ASSIGNMENTS, TO THE MARYLAND 'rnus'r company, TRUSTEE, a conroaanon or uanrnaun. v I

PUMPING arranarus.

I :Appli'c ation filed m 29,1919. serial no. 312,784.

To all whom itmory concern: I

Be it known that we, SAMUEL DuivoAN BLACK and Ammo G. Deanna, citizens of the United States of America, and residents of the city of Baltimore, State of Maryland,

' I have invented certain new and useful Imwhich the following isa specification.

provements in Pumping Apparatus, of

The subject of this invention is a pumping apparatus with motor, pump, gearing, and in fact the entire apparatus complete in a single casing; 2

Important 'features of the invention are found in the arrangement ofthe different units making up the apparatus, in the manner of mounting the same within the casing itself and in the combination of these features-to efi'ect cooling, utilizing the casing,

as an air jacket for cooling both the motor and the compressor cylinder.

The cooling effect which is achieved in Q this way is soetfective that the motor may wlthout injury be driven at a high speed far in excess of the speed of which the same motor would be capable with the same load if uncovered, It is thereiore geared for such a speed and under these conditions it .develops a proportionately larger horse power, making'it possible to use a smaller motor than when the apparatus is difl'erently arranged, thus reducing the bulk and cost of the apparatus 'without loss of efiiciency. I v r *fitherwise, the arrangement of the parts movlng members.

in a single casing in accordance ,with the.

present invention protects the parts fromdirt, grit and the action ofthe elements,

and from breakage, gives a pleasing appearance and protects those in the vicinity from purposes, particularly in the inflation of 7 tires, complete absence of oil from the com-' pressed air is essential, and thegreate'st perinjury by contact with the gears and other In the use of compressed air for various manency of the lubrication is highly desirable, making it possible'to close the casing and give no attention to the apparatus for long periods of hard service. The I present device includes a lubricating system "particularly adapted for'use-in this connection in that it uses heavy grease as a-lubricating agent for the connecting rod and wrist pin bearing and in the cylinder, the grease being applied to the cylinder in very small quantities by a system which supplies ,such' small quantlties of grease with the greatest regularity, thedifiiculty of achieving uniform distribution of such grease being the principal obstacle to its use. 'Toxaccomplish this a supply of the proper kind of heavy of Vaseline is placed in the crank case so that the crank dips into it at every rev'olu tion. The bottom of. the cylinder just beneath' the piston is closed by means of a sheet or disk of absorbent material shown as felt. This is'slotted to pass the connecting rod and is just high enough to be engaged or struck by the bottom surface of the piston at each stroke of the pump. The heavy grease works up along the connecting rod and is thrown up sufiiciently. to keep the bottom surface of the felt disk smeared with grease. This works through the disk by capillarity or otherwise. and small quantities aretransferred to the piston at each stroke, the contacting surfaces of the piston and cylinder being lubricated by 'the' lubricant which is of about the'consistency is very economical in the expenditure of grease.

Another important featureof the invention consists in the construction of. the casing or housing in two sections, the lower section somewhat resembling in shape an ordinary bath tub or dish with the parts bridged-"across the top of the casing, the

:latter acting as a support.

In the accompanying drawing we have illustrated the commercial form of pump- 1 ing .apparatus embodying the features of our nvention in .the preferred form.

In the drawings- Figure 1 is a'vertical central longitudinal- .section, certain parts vbeing shown in eleve on. a

Figure 3 .1s a section on the line 3, 3 of Figure 1 in a plane parallel with Figure 2.,

the plane of the figure heinn" the pianeoit the axis of the pump cylind Figure 1 is a section on the line 4, i c Figure 1 taken on a plane transverse to t" plane of Figure 1 and showing the tanan adjacent portion of the casing.

Figure 5 is an external view, particularly an end elevation, taken from the right of the machine as seen in Figure 1.

Referring to the drawings by numerals, the apparatus consists of a housing 1 enclosing and supporting a pump 2, an electric motor 3, suitable gearing 1 connecting the motor and pump, and a tan 5 on. the motor shaft. More particular y, the casing in its preferred form as shown is divided horizontally into a bottom section '2' having; suit able battles and bearing supports as hereinafter described, and a top section 8 which is shown as constructed in three parts connected by a lap-joint 9 and 9. The top section is also illustrated as provided with an upright turret 10 for the pump cylinder 11, the head of which protrudes from the casing as indicated at 12 and to be hereinafter further described. The bottom halt of the casing 7 is provided at each side near the top with inwardly projecting ears 13, 1d,. 15., 16, 117 and 118. The ears 13, 1 1 at the front, i. e., adjacent the cylinder turret 10, serve as a support for the pump cylinder base 1? which is bridged across the casing this point overlying the cars 13, at each side and bolted thereto. Further bacir the motor frame 18 is bridged across the casing resting on and'being bolted to the ears 15 and 16.

Between the pump andthe motor the bottom section is divided by a transverse partition 19 supporting a bearing hoss 20 for the crank shaft 21. The bearing contains a bushing 22. Above the hearing the partition. 19 is formed into a transverse channel or trough 23 containing lubricant preferably in the form of heavy grease. The bottom 230 of the channel or receptacle 23 is inclined downward toward the center as shown in Figure 3, and at this point there is an aperture 231 suitably curved as to its bottom or outer surface as indicated in dotted lines in Figure 3, the curve being almost tangent to the curve oi? the inner surface of the bearingand shaft surfacebut intersecting them to a slight degree, lhis aperture extends through the bushing 22 to the bearing surface and shaft, a considerable area of which shaft is enposedas indicated. in the aperture 230 is a portion of a wick 232, the same being pressed downward into the aperture by a 7 plate spring 233, the remote end of the spring and the wick being'secured to the botto the channel by a bolt or screw 23%. 1t war he noted that the wick conforms tothe sur face of the aperture and bears against the exposed surface of the shaft.

lit becomes and remains thoroughiy rated with grease which oozes throu, wick fabric in sutiicient quantities he shaft bearing lubricated Without Suppl ing any surplus which might leak out o tween the hearing surfaces and be wasted or carried over with the air.

Above the partition 19 the casing spanned by a strut or bearing support 2 carrying a bearing 241 for the motor sha 25. This strut 24: has a depending web 2 3; which overlaps the top edge of the partitio 19, and the overlapping portions are show: as packed with a strip of fibrous material of felt 26.

It will he noted that the overlapping edges are in the form shown inclined downwa 9 toward the center of the casing to accommodate the bearing. The bearing 241 which has a bushing 2&3 is apertured from hence as indicated at 21- 1, the aperture heir. formed on a shailow curve in a plane tra verse to the aXis of the shaft. which curve is nearly tangent to the shaft, the "inns being cut away to provide a-consideraopening at 2 15 exposing a section of the shaft. The aperture is occupied by the end portion of a wick 250 which dips in he l bricant in the receptacle tie wic e' in turn held in position in the aperture by means date spring 2 1 lhe channel or receptacle 23 being; an plied with heavy grease, the wicks rema i saturated with the grease, and the be nos thus evenly and continually coated we heavy lubricant. While this has the a m vantage of adhering to the lubricated par so that is not carried over with the also is of a more permanent nature lighter lubricating oils and is much efficient as a lubricant. A lubricant nature is more dependable and lasts longer than lighter oil. lhe bearings thus luhricated need no attention except at periods or several months nearly constant or continual runnin q Referring to- Figures 1 and 41, it wiil he noted thatthere is a partition 28., longitudinal or otherwise offset from the partition 19 and otherwise extending transversely oi": the casing as indicated. he plane of this partition and cooperating therewith is a partition drawn on a curve which at the right in .Figure- 4 is cam... at the shaa 25, an

the left "it is of increasing radius, which meets the casing. at the 'top edge, givinga may be termed the motor casing, is further divided by a transverse partition 33,see F igure 2, on the central transverse plane of the f f rod, and the'parts are so proportioned that motor. This partition serves as a web or strengthening member extending from the lug which supports the motor on one side to the lug 16 which supports the motor on the other side, being formed integrally with the walls of the bottom half of the casing on the entire section and curved to enclose the motor frame. It is also cut away centrally,

at 34 to admit the crank shaft 21.

The crank shaft 21 is supported at the rear in a bearing boss 35 having a suitablebushing 36 and formed above into' a' grease cup 37-:trom which grease is fed to the bearing surface by a spring controlled wick 38." The bearing has a cover 39 held in position by a spiral spring 40 which passes around the boss and is hooked at each end into the cover 39. The shaft 21 is held in positionjagainst end play bya washer or disk 42. f g

The'motor shaft is mounted inthe bearing member 241 already described,back of which bearing member is the fan '5 also carried on The valve chambers are each-provided wlth I this shaft. Beyond the fan is the motor-1 3 and therein end'of the shaft iscarried in a uitable bearing boss 47 on aftransverse strut 46 secured to the frameon'suitable e'arsf117 and 118 ateach side. This bearing boss is bushed as shown and providedht theftop with a grease cup 48 from'whichi grease is led to the bearing by a wiok'49 as in connec tion with the grease cup 37..

At the forward end of th motor shaft by which thecrank' or flywheel which as shown is hollow,forppurposesof lubrication, having radial passagesjfilxf-Thi's 7 pin engages a'suitable. bearing 52in" the endof'the connecting rod 53, theflbearing being provided with a 'lubric'ating'pa ssa'ge 54 to co-operate with the passagesfil.

The pump as shown has a single upright cylinder 11 supported in} the 'turret 10 of the top half of'the casingxasalready de-L scribed, the same beingmounted on abasej 17 In this cylinder is thepiston 5,5 actuated by a connecting rod .53 thaough fthe usual wrist pinj56.

The lubrication ofair' um b I diflicult problem on account of the necessit .tor keeping the compressed air free from 01 'jema 'shaa is the fly-wheel orcrank disk 4 3secured1to1the' This i accomplished in the present'insta'nce a by usin a heavy grease distributed as follows. 'l e bottom of the cylinder in the forin of the invention shown, is closed by a fibrous or feltnp'ad or disk 57, thesame being in the form of the invention shown supported by secured by pins 59. The felt disk or pad is centrally slotted at 60 to pass the connecting the rear or bottom face'of thepiston'at 61 contactsrather closely with the disk or pad at each stroke. The portion of the casing forward of the partition 19 is supplied with heavy grease .toa level a little below the .crank shaft so that the crank pindips into it .;a thin "metal ring58 and the whole being portion of grease to the piston at each stroke as it comes in. contact with the disk.

The cylinder headin the form of'the invention'sho'wn is outside the turret 10 which is open at the top, and thisc'ylinder head has two valve chambers 62 and 63. In valve chamber 62 is a poppet'valve64' opening inward and servingas the intake valve, and in' the valve chamber 63 is a valve; 65 opening outward and serving as the delivery valve.

plugs 66 by the removal of which the valves i are made accessible for grinding and replacemerits. The cylinder headis'also connected to an intakepassage 6'1 and a deliyery 68, thelatter' leading to a separatingand con. densing chamber 69 which as shown' s suits ably supported on theoutsideof: the caslng 10 1Ant mportantfeatureof'the'invention re-zsides in the arrangement of the;inlet -..valve" 64, which as aforesaid, opens "inwardly-to prevent it from'ffalling into the' cyhnderm 'case it becomesfreleased as by 'dlsplacement or 'sheering of'a valve'pin' 601.

an rangement consists in placing-the valve and valve f seat, the latter being indicated by.

reference characters 602, so thatasmall sag-c, ment' of the valve overlies the: cylinder. wall. To provide sufiicient play of the -'valveso that it may have the requiredopeningithe cylinder wall isnotched as indicated'at 603,.

the notch being of horizontal cross section slightly greater than thecorrespondlng seg-' ment of thevalve. Looking at the-casing f om the, rearias f shown inFigure 5' and at the right in Figure 1. it will'vbe noted-that thereis an opcningf 7 2 just above the rear crank shaft: bearing 35. Thisbpening is ov'erh'ungbythe deg j pending'plate'or proiection 73 on the top? half of thejcasing, which platejextends 0.1+

' most acrossthe casing from one side to th'e other of the rear, the openin 72 being corthe cylinder casting 2 is cannot be carried into the air being respondingly shaped. llhis depending plate provides a downwardly disposed horizontally extending elongated opening for the admission of air.

In operation the rotary pump or blower 5 sets up a suction at the opening 30 to satisfy which, air in considerable volumes is drawn through the opening 72 under the depending plate 73. The draft thus created passes, first, over the bearing 35 of the crank shaft, then over the bearing &6 at the rear end of the motor shaft, then around and through the motor housing and through the opening 34 around the crank shaft, whence it is brought in contact with the front crank shaft bearing 20. From these points it is gathered at the opening 30 as described, passing through the fan 5 by which it is moved and caused thus to circulate, to the turret 10 where it sweeps the entire outer wall of the pump cylinder and finally escapes by way of an opening 74, see Figure 1, provided for this purpose between the top edges of the turret and the top flange of the 1 cylinder.

In this connection it will be noted that there is a b-aflie or plate 75 separating the turret or cooling air exit passage from the crank case space to prevent the loss of lubricant which might splash up into the outgoing air draft and be thus carried over and out of the casing, as the battle is preferably held. between the edges of the two halves of the casing; For a similar purpose formed of depending flanges 76.

One of the important objects attained is the complete and etficient cooling of the parts which is brought about by their complete enclosure in a casing which acts as an air pocket and their arrangement as herein described and by the distribution of the air current just outlined, so that it is passed over the bearings through the motor and caused to thoroughly sweep the walls of the The cooling of the parts, particularly themotor, is so efiicient that the motor can be run at a high rate of speed and is therefore connected to the pump at a very low gear, giving the desired amount of power with a much smaller motor than has previously been used, particularly with the open systems.

The manner of supporting the different units within a single housing by bridging them across the lower half of the housing and covering them with the upper half, gives a cheap and efficient housing construcpump cylinder.

tion, a rigid support and an otherwise de Also, the system of the heavygrease which pumped, is supplied in minute quantities with continuous regularity and uniformity to all the bearing surfaces, is of great advantage both sirable arrangement. lubrication by which :with the motor and fan,

aaeasoa on account of its efliciency as a lubricant, its economy as to lubricating material, its permanency, and because it makes it possible to supply the machine with lubricant atone time for several months running, and further because it dispenses. entirely with the presence of grease or oil in the compressed air.

We have thus described specifically and in detail a machine embodying our invention in the preferred form, but the specific description is supplied in order that the device may be easily understood and constructed by those skilled in the art, 'these'terms being used in the descriptive rather than in a limiting sense, the scope of the invention be ing defined in the claims:

1. A pumping apparatus consisting of a pumping cylinder, a piston, a crank and a 'crank shaft, a motor, means connecting the a turret in the casing open at one end, the

pump cylinder being set in the turret with the opening encircling the cylinder near the head, the fan having the effect of drawing a current of air in at the opening at one end, passing it in contact with the bearings through the motor to the fan and delivering it so that it sweeps the pump cylinder, passing out through the openings at the end of the turret.

2. In a gas compressing and exhausting apparatus, the combination of' a pump cylin-. der and piston, a motor, a shaft to which the motor is mounted, a fan on said shaft and a crank shaft for the pump, a casing enclosing the entire apparatus and having an elongated opening at one end, the motor and crank shaft having bearings immediately adjacent said opening, a transverse partition with an opening in which the motor is mounted, a transverse partition beyond the motor having an opening in line a turret surrounding the pump cylinder with an opening at the end of the turret conforming to the periphery of the cylinder near the head whereby the fan is caused to draw air in at the and pump, a casing enclosing the entire apparatus, the same be-in formed in upper and lower sections, and supporting means by which the units of said apparatus are mounted by bridging across the top of the lower section.

4. Air compressing apparatus consisting of a pump having a cylinder, a piston, a crank, a crank shaft,a motor having a shaft, a fan thereon, gearing connecting said shafts which are parallel, a casing enclosing said apparatus, the same being elongated in the direction of the length of the shafts having an opening at one end adjacent the ends of the shafts which have bearings at this end, means for causingthe air'current created I by the fan to pass in the direction of the length of the shafts through and around the motor, the casing including a wall surrounding the pump cylinder forming a jacket encircling the outer surface of the pumpcylinder' with an opening near the head so that the air is caused to pass around and sweep the surface of the pump cylindenand pass through said opening.

5. In combination, a pump and motor, a casing enclosing the same, means for lubricating the pump consisting of a grease receptacle in the path of the crank pin, an absorbent member in the path. of the rear end of the piston, the latter having an opening for the passage of the connecting rod so that the absorbent member receives grease from the said receptacle, which grease, being passed through the absorbent member, is transferred to the piston when the latter contacts with it, means for lubricating the pump shaft and the motor shaft, consisting of a grease receptacle on the pump shaft bearing, the bearing having an opening leading from said receptacle to the bearing surfaces, a wick in said opening and means for pressing the same against the surface of the shaft, the motor shaft having a second bearing over the first-mentioned bearing with an opening from below leading to the shaft surface, a wick in said opening leading from said latter receptacle, and means for pressing said wick agalnst the surface of the shaft whereby the pump and bearings are lubricated with nonfluid grease.

6. Means for lubricating a shaft bearing consisting ofa cup on the bearing above the bearing, the cup having an openlng leading to the shaft surface, the same having side walls on a fiat arc or angle, a wick in said opening conforming to said side walls and to the surface of the shaft exposed by-said opening, and means in the form of a plate spring for pressing said wick against the shaft, means for lubricating adjacent shaft bearings consisting of a cup on one said bearing; an opening in the bottom of said cup, a wick in said opening conforming to the said walls and to the surface of the shaft, means for pressing said wick against the surface of'the shaft, the remainder of the wick being in the cup, an opening in the other bearing leading to the shaft surface, the samehaving walls arranged on a shallow are or angle, a wick in said opening and'a plate spring at one side ressing the wick against the shaft surface, t e wick dipping into the cup on the aforementioned shaft.

Signed by 'us at Baltimore, Maryland, this 18th day 0 July, 1919.

SAMUEL DUNCAN BLACK. ALONZO GALLOWAY DECKER.

Witnesses:

O. W. Dmmmon, D. G. CAYWOOD. 

